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DSP56857 bảng dữ liệu(PDF) 149 Page - Freescale Semiconductor, Inc

tên linh kiện DSP56857
Giải thích chi tiết về linh kiện  Digitial Signal Controller
PDF  662 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

DSP56857 bảng dữ liệu(HTML) 149 Page - Freescale Semiconductor, Inc

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External Memory Interface (EMI), Rev. 4
Freescale Semiconductor
5-23
Figure 5-17. External Write Cycle with WWS = WWSH = 1 (WWSS = 0)
5.1 Clocks
The EMI operates from clocks internal to the chip and does not require/provide clocks external to
the chip.
5.1 Interrupts
There are no interrupts generated by this module.
5.1 Resets
All reset types are equivalent for the EMI and therefore have the same effect. The EMI outputs
during reset are controlled by the DRV bit of the BCR. During reset this bit is set to zero.
Therefore, Table 5-6 defines the reset state of all EMI pins.
tCWL
tCWH
tCWL
tCSV
tWDO
tWHZ
tWDE
tWDO
tAV
tWAC
IDLE
IDLE
Write (WWS = WWSH = 1)
IDLE
tWRL
tDH
tDW
tWRH
tAVW
tDW
tAVW
tWRL
tDH
tDW
tAVW
INT_SYS_CLK (core)
int_delay_SEMI_clk
A[23:0]
RD = OE
D[16:0]
CS2
WR
Time added to Figure 5-13 by setting WWSH = 1
tWHZ
tDH
Write(WWS = WWSH = 1)
Write (WWS = WWSH = 1)
tAV
tCSL
tCSV



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